* {
  box-sizing: border-box;
}

body {
  height: 100%;
  margin: 0;
  -moz-osx-font-smoothing: grayscale;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-family: "Source Han Sans CN";
}

label {
  font-weight: 700;
}

html {
  height: 100%;
  box-sizing: border-box;
}

#app {
  height: 100%;
}

*,
*:before,
*:after {
  box-sizing: inherit;
}

a:focus,
a:active {
  outline: none;
}

a,
a:focus,
a:hover {
  cursor: pointer;
  color: inherit;
  text-decoration: none;
}

img {
    display: block;
    width: 100%;
    height: 100%;
}

.flex-center {
  display: flex;
  justify-content: center;
  align-items: center;
}
.flex-column-center {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}